<!DOCTYPE html>
<meta charset="UTF-8">
<title>width: calc-size() animations</title>
<link rel="help" href="https://drafts.csswg.org/css-values-5/#calc-size">
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../../support/interpolation-testcommon.js"></script>

<style>
.parent {
  display: block;
  width: 200px;
}
.target {
  display: block;
}
.target::before {
  display: block;
  content: "";
  width: 100px;
}
</style>

<body>

<script>
  test_interpolation({
    property: 'width',
    from: 'calc-size(auto, size)',
    to: 'calc-size(auto, size * 2)',
  }, [
    { at: -0.25, expect: '150px' },
    { at: 0, expect: '200px' },
    { at: 0.25, expect: '250px' },
    { at: 0.5, expect: '300px' },
    { at: 0.75, expect: '350px' },
    { at: 1, expect: '400px' },
    { at: 1.25, expect: '450px' },
  ]);

  test_interpolation({
    property: 'width',
    from: neutralKeyframe,
    to: 'calc-size(auto, size * 2)',
  }, [
    { at: -0.25, expect: '150px' },
    { at: 0, expect: '200px' },
    { at: 0.25, expect: '250px' },
    { at: 0.5, expect: '300px' },
    { at: 0.75, expect: '350px' },
    { at: 1, expect: '400px' },
    { at: 1.25, expect: '450px' },
  ]);

  test_interpolation({
    property: 'width',
    from: 'calc-size(min-content, 0px)',
    to: 'calc-size(min-content, size)',
  }, [
    { at: -0.25, expect: '0' },
    { at: 0, expect: '0' },
    { at: 0.25, expect: '25px' },
    { at: 0.5, expect: '50px' },
    { at: 0.75, expect: '75px' },
    { at: 1, expect: '100px' },
    { at: 1.25, expect: '125px' },
  ]);

  const KEYWORDS = {
    "auto": 200,
    "min-content": 100,
    "fit-content": 100,
    "max-content": 100,
    "stretch": 200,
  };

  for (const keyword in KEYWORDS) {
    let expected = KEYWORDS[keyword];
    test_interpolation({
      property: 'width',
      from: keyword,
      to: `calc-size(${keyword}, size * 2)`,
    }, [
      { at: -0.25, expect: `${expected * 0.75}px` },
      { at: 0, expect: `${expected}px` },
      { at: 0.75, expect: `${expected * 1.75}px` },
      { at: 1, expect: `${expected * 2}px` },
      { at: 1.25, expect: `${expected * 2.25}px` },
    ]);

    test_interpolation({
      property: 'width',
      from: keyword,
      to: 'calc-size(any, 50px)',
    }, [
      { at: -0.25, expect: `${expected * 1.25 - 50 * 0.25}px` },
      { at: 0, expect: `${expected}px` },
      { at: 0.75, expect: `${expected * 0.25 + 50 * 0.75}px` },
      { at: 1, expect: `50px` },
      { at: 1.25, expect: `${50 * 1.25 - expected * 0.25}px` },
    ]);

    test_interpolation({
      property: 'width',
      from: 'calc-size(any, 50px)',
      to: `calc-size(${keyword}, size * 2)`,
    }, [
      { at: -0.1, expect: `${50 * 1.1 - expected * 0.2}px` },
      { at: 0, expect: "50px" },
      { at: 0.75, expect: `${50 * 0.25 + expected * 1.5}px` },
      { at: 1, expect: `${expected * 2}px` },
      { at: 1.25, expect: `${expected * 2.5 - 50 * 0.25}px` },
    ]);

    test_no_interpolation({
      property: 'width',
      from: keyword,
      to: 'calc-size(50px, size)',
    });
  }

  const KEYWORD_PAIRS = [
    [ "auto", "fit-content" ],
    [ "fit-content", "min-content" ],
    [ "stretch", "auto" ],
    [ "max-content", "stretch" ],
  ];

  for (const pair of KEYWORD_PAIRS) {
    test_no_interpolation({
      property: 'width',
      from: pair[0],
      to: `calc-size(${pair[1]}, size)`,
    });
  }

  test_interpolation({
    property: 'width',
    from: 'calc-size(20px, size)',
    to: 'calc-size(60px, size)',
  }, [
    { at: -0.25, expect: '10px' },
    { at: 0, expect: '20px' },
    { at: 0.75, expect: '50px' },
    { at: 1, expect: '60px' },
    { at: 1.25, expect: '70px' },
  ]);

  test_interpolation({
    property: 'width',
    from: 'calc-size(50%, size)', /* 100px */
    to: 'calc-size(60px, size)',
  }, [
    { at: -0.25, expect: '110px' },
    { at: 0, expect: '100px' },
    { at: 0.75, expect: '70px' },
    { at: 1, expect: '60px' },
    { at: 1.25, expect: '50px' },
  ]);

  test_interpolation({
    property: 'width',
    from: 'calc-size(37px, 200px)',
    to: `calc-size(37px, size * 2 + 7% + 12px)`, /* adds to 100px */
  }, [
    { at: -0.25, expect: '225px' },
    { at: 0, expect: '200px' },
    { at: 0.75, expect: '125px' },
    { at: 1, expect: '100px' },
    { at: 1.25, expect: '75px' },
  ]);

  let parent_auto_style = document.createElement("style");
  parent_auto_style.innerText = `
    body { width: 300px; }
    .parent { width: auto; }
  `;
  document.head.append(parent_auto_style);

  test_interpolation({
    property: 'width',
    from: 'inherit',
    to: `calc-size(auto, size * 0.5)`,
  }, [
    { at: -0.25, expect: '337.5px' },
    { at: 0, expect: '300px' },
    { at: 0.75, expect: '187.5px' },
    { at: 1, expect: '150px' },
    { at: 1.25, expect: '112.5px' },
  ]);

  parent_auto_style.remove();


</script>
